Вот так:
Код AS3:
package {
import flash.display.GradientType;
import flash.display.Sprite;
import flash.events.Event;
import flash.geom.Matrix;
public class Main extends Sprite {
public function Main():void {
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e:Event = null):void {
removeEventListener(Event.ADDED_TO_STAGE, init);
var circle: Sprite = new Sprite();
circle.x = 200;
circle.y = 200;
addChild(circle);
var radius: Number = 50;
var matrix: Matrix = new Matrix();
matrix.createGradientBox(radius * 2, radius * 2, 90 * Math.PI / 180, radius, radius);
circle.graphics.lineStyle(1, 0x000000, .3);
circle.graphics.beginGradientFill(GradientType.RADIAL, [0xFFFFFF, 0xC0C0C0], [1, 1], [0, 255], matrix);
circle.graphics.drawCircle(100, 100, radius);
}
}
}